Konstantinos E. Farsalinos is a research fellow at the Onassis Cardiac Surgery Center in Athens, Greece, at the Department of Pharmacy of the University of Patras in Greece; and at the National School of Public Health (Greece).

He has been conducting laboratory and clinical research on e-cigarettes as a principal investigator since 2011. Examples of his work include the first study on the cytotoxic effects of e-cigarette vapor on cultured cells and the immediate effects of e-cigarette use on cardiac function and coronary circulation. He ran a worldwide online survey of almost 20,000 vapers, identifying patterns of use and experience with e-cigarettes among consumers, published in 2014. He also co-authored the first systematic review on e-cigarette safety, which was published in 2014.

He has analyzed patterns of e-cigarette use based on large European and U.S. population surveys (Eurobarometer, National Youth Tobacco Survey). Additionally, he is performing research work on heated tobacco products. His research findings have been presented in major international scientific congresses, and his studies were used in preparing the regulatory framework on e-cigarettes in the European Union.

As of 2018, he has published more than 60 studies and articles in international peer-reviewed scientific journals about smoking, tobacco harm reduction and e-cigarettes. He was the handling editor and author of a book titled Analytical assessment of e-cigarettes, which was published by Elsevier in 2017.